Pivot window

ABSTRACT

Pivot window which, at two opposing corners of the sash, preferably the two upper corners, is slidably connected to the frame by means of a groove/pivot means; a mounting on both sides of the window supporting the window sash during pivotal movement thereof beyond the frame. The mountings are arranged at the center of the frame portions which are provided with grooves, and the mountings are constituted by extendible arms which are rigidly connected to the frame and articulated to the sash. The extendible arms are effected on the lazy-tong principle.

3,500,894 3/1970 Pofferi 160/22 I United States Patent [151 3,638,360 Vaa Feb. I, 1972 [541 PIVOT WINDOW l Primary Examiner-Kenneth Downey [72] Inventor. Dyre Van, 3890 Ytre Vln e, Norway A"omey cushman, Darby & cushman [22] Filed: May 7, 1970 21 1 Appl. N6: 35,328 [57] ABSTRACT Pivot window which, at two opposing comers of the sash, [30] Fore'gn Apphcamn Pnomy Data 7 preferably the two upper corners, is slidably connected to the frame by means of a groove/pivot means; a mounting on both a May I9, 1969 Norway ..2040/69 Sides of the window supporting the window sash during pivotal s2 U.S.Cl ..49/24s movement thereof beyond the frame- The mountings are [51] E05d 15/40 ranged at the center of the frame portions which are provided [58] Field 6: Search ..49/246, 248, 249, 324; 160/22, with grooves, and the mountings are constituted y extendible 160/113, 32, 78, 69 arms which are rigidly connected to the frame and articulated to the sash. The extendible arms are effected on the lazy-tong References Cited principle.

UNITED STATES PATENTS 2 Claims, 3 Drawing Figures 1,193,101 8/1916 Wilson ..49/249 PATENTED FEB H972 3,638,360

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' BY I PIVOT wmnow The present invention relates to an improvement in pivot windows which, at two opposing corners of the sash, preferably the two upper comers, are slidably connected to the frame, for example by means of a groove/pivot means; a mounting being provided on both sides of the window for support of the window sash during pivotal movement thereof beyond the frame. It is known to mount a window in such a manner that one end of the sash, preferably the upper end, is slidably connected to the side of the frame. The window sash is usually provided with a pivot at each upper comer, the said pivot being guided in a groove cut in respective sides of the frame. The window is opened by pressing the lower portion of the sash outwardly, the upper portion being guided in the groove. During such movement, the window is supported by a mounting on either side of the sash, one part of the mounting being secured to the sash and another part to the frame. In the known embodiment examples, the said mountings consist of arms hinged one to the other, and to the sash and frame, respectively; said arms, when the window is closed, fitting into a part of the frame or sash. Long grooves must then be cut in the said window parts which weakens the window and also subjects it to damage from rain which may penetrate into the grooves. Much time and careful fitting is necessary when mounting the known mountings, moreover.

The object of the present invention is to eliminate the above-described disadvantages by providing an arrangement in pivot windows which requires the smallest possible groove cut out of the window parts, and has a mounting which is very simple to fit.

In accordance with the invention, this is achieved by an improvement in pivot windows which, at two opposing comers of the sash, preferably the two upper corners, are slidably connected to the frame, for instance by means of a groove/pivot means, a mounting on both sides of the window supporting the window sash during pivotal movement thereof beyond the frame, and the invention is characterized in that the mountings are fitted at the central axis of the window, which axis extends transversely of the guide grooves, and in that the mountings are constituted by extendible arms which are rigidly mounted to the frame and articulated to the sash.

In a preferred embodiment example of the invention, the extendible arms are constructed on the lazy-tong principle. The anns being entirely or substantially received in a housing fitted into the side of the frame.

In this manner, a very simple support of the window sash, during pivotal movement thereof, is achieved, and force required for movement thereof, is achieved, and the force required for movement of the window is minimal, since the center of gravity of the window is not displaced in the vertical direction, but is displaced in the horizontal plane, the upper portion of the sash being guided vertically in the grooves and the lower part of the sash pivoted outwardly and upwardly. The mounting may be narrow in shape, since none of the parts of the arms are subjected to any differential moment of force, as was the case in previous mountings. In that the mountings are narrow, the grooves in the sash portions for receiving the lazy-tong arms are also narrow. The small opening remaining in the housing may be covered by cover plates which entirely cover the opening when the window is in closed position.

The invention is further explained in the following with reference to the drawing, which illustrates a preferred embodiment example of the invention.

FIG. 1 is a view of a window with the arrangement according to the invention, and

FIG. 2 is a view of a lazy-tong mounting according to the invention, in fully extended position, and

Flg. 3 is a view of a lazy-tong mounting in partially extended position.

The window in FIG. 1 comprises in conventional manner a window frame 1 having a step 2 for a window sash 3. The window sash is provided at its upper part with pivots 4 on the two upper corners thereof. The said ivots 4 are adapted to slide in grooves 5 in the two vertical sas portlons. The said two vertical sash portions are provided at the center thereof with grooves 6 for receiving a housing 7 for a lazy-tong arm 8. The lazy-tong arm is connected by means of hinge mounting 9 to the center part of the sash 3 on the outside thereof. One inner arm 10 of the arm 8 is pivotally connected to the housing 7. The other inner arm 11 slides with its inner end in a vertical groove 13 in the housing 7 by means of a pivot 14.

As is apparent from FIG. 2, the lazy-tong arm 8 is substantially entirely received in the housing 7; and the slot in the housing, wherein the lazy-tong arm is received is protected from rain by a divided cover plate 15, 16 which is in overlapping relationship. It is then impossible for water to penetrate into the mountings and thus damage the lazy-tong arms or cause the sash parts to rot. The two cover plates 15, 16 are secured to the outer arm portions l7, 18.

When the window is to be opened, the lower part of the sash 3 is pushed outwardly, for instance to the position illustrated in FIG. 3, the upper part of the window being guided down in the grooves 5. When the window is to be swung entirely around for cleaning purposes, so that the outer side faces inwardly, it is necessary merely to continue the movement. The lazy-tong arms 8 then move outwardly until the window sash is in horizontal position. On further upward swing of the window by its lower end, the mounting is shortened, and the central portion of the window moves inwardly towards the frame. On further slide/swing movement, the lazy-tong arms 8 will continue to move closer into the housing 7 until the window sash is once more closed into the frame, this time however, with the side which previously faced outwards now facing inwards. By introducing a friction device into the mounting in known manner, the window may be disposed in any ventilating position, without further securement being necessary.

The invention is not restricted to the embodiment example described and illustrated on the drawing, but may be varied within the scope of the following patent claims. Thus, the extendible arms may consist of telescopic tubes, for example, and the grooves 5 may be located on two horizontal sash sides.

Iclaim:

1. In a pivot window of the type in which two opposing corners of the window sash are slidably connected to the window frame by pivot means carried upon said sash which are guided by groove means formed along opposite sides of said frame so that the window sash may be tilted out of the plane of said frame; and including lazy-tong type extensible arms, which are pivotally connected at their outer ends to the window sash to support said window during tilting movement, the improvement comprising a housing fitted into one of the frame sides adjacent the center of said groove means the inner ends of said extensible arms being pivotally and slidably connected within the housing whereby said extensible arms project outwardly from said housing when the window sash is tilted and are retracted within the housing when said window sash is substantially in the plane of said window frame, and cover means secured to the outer ends of said extensible arms substantially covering said opening when said extensible arms are in the retracted condition.

2. The pivot window as recited in claim 1 wherein said cover means comprises articulated coverplates which cover the outer ends of said extensible arms even in their extended position. 

1. In a pivot window of the type in which two opposing corners of the window sash are slidably connected to the window frame by pivot means carried upon said sash which are guided by groove means formed along opposite sides of said frame so that the window sash may be tilted out of the plane of said frame; and including lazy-tong type extensible arms, which are pivotally connected at their outer ends to the window sash to support said window during tilting movement, the improvement comprising a housing fitted into one of the frame sides adjacent the center of said groove means the inner ends of said extensible arms being pivotally and slidaBly connected within the housing whereby said extensible arms project outwardly from said housing when the window sash is tilted and are retracted within the housing when said window sash is substantially in the plane of said window frame, and cover means secured to the outer ends of said extensible arms substantially covering said opening when said extensible arms are in the retracted condition.
 2. The pivot window as recited in claim 1 wherein said cover means comprises articulated coverplates which cover the outer ends of said extensible arms even in their extended position. 